"It's not easy. We want to improve on a qualitative level. We are happy with our attack. We are the most prolific team in Serie A. So I don't believe that this is Juventus' problem."

Marotta may well have to review that standpoint after Fabio Quagliarella went down with what looked like a serious knee injury against Parma.

Asked about Juventus' goalkeeper situation which has been complicated by the return of Gigi Buffon, he said: "I don't believe it's a problem. He is acting in full harmony with us and is recovering from injury. He will play in the Coppa Italia against Catania."

Finally Marotta turned his attention to long-term transfer target Edin Dzeko who looks set to join Manchester City from Wolfsburg.

"He has a very high value [as a footballer], so he wouldn't just have done well for Juventus.

"There was a great difficulty for us [in trying to sign him]. There would have been no space for him bureaucratically in January because we have already registered a non-EU player in Milos Krasic."